// Copyright 2022 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

namespace esp_modem {

/**
 * Common unique buffer, which is transferable between DTE and CMUX
 *
 */
struct unique_buffer {
    explicit unique_buffer(size_t size);
    unique_buffer (unique_buffer const&) = delete;
    unique_buffer& operator=(unique_buffer const&) = delete;
    unique_buffer(unique_buffer&& other) noexcept
    {
        data = std::move(other.data);
        size = other.size;
        consumed = 0;
    }
    unique_buffer& operator=(unique_buffer&& other) noexcept
    {
        if (&other == this) {
            return *this;
        }
        data = std::move(other.data);
        size = other.size;
        consumed = 0;
        return *this;
    }
    [[nodiscard]] uint8_t *get() const { return data.get(); }

    std::unique_ptr<uint8_t[]> data;
    size_t size{};
    size_t consumed{};
};

}